User Guide

MO-200B
4569-MA
1
MODELS L33-37-39
FURNACE ASSEMBLY INSTRUCTIONS
This Thermo Pride furnace is shipped disassembled, however it was completely assembled at the factory first - then
disassembled for packaging. Holes were drilled into the various casing parts during assembly. If the furnace is
installed on a level surface and all parts put together properly, the holes will line up for metal screws. Do not redrill
any holes. Check for incorrect alignment of parts if holes do not line up.
Assemble furnace as follows: (Figs. 1, 2, and 3).
1. Set base pan on level
floor where furnace is to be installed. (Fig. 1).
2. Set furnace heat exchanger (1) on base pan. Make certain heat exchanger is centered on base (side to side) and
pushed forward until the pouch front (2) of the heat exchanger is tight against base angle.
(See Fig. 1).
3. Assemble rear side casings to furnace (7). Set rear side casing on clip over base pan .
4. Install white crane glass gasket on flue flange of heat exchanger. (See Fig. 2).
5. Install rear separator (11) (See Fig. 1). Make certain angle on bottom of separator is engaged in base separator
clip. Rear separator must be installed over gasket on heat exchanger flue flange sandwiching the separator between
the heat exchanger flange and flue extensions flange. (See Fig. 2). Fasten to rear side casings with hex head sheet
metal screws in holes provided. (Rear flue models only).
6. Assemble flue pipe extension on flue flange of heat exchanger making certain the rear separator is installed
between the flue flanges. (See Fig. 2). No trim ring is provided for this location. Secure flanges securely using 5/16"
brass nuts provided.
7. Install front side casings (4) on base and lock into clip on base and join front and rear casing using the pocket
seam between casings, then fasten casings together with hex head sheet metal screws in holes provided. (See Fig. 1).
8. Insert lower front separator panel (3) around pouch in between base angle and pouch front , clip on lower front
separator panel (3). (See Figure 1.)
9. Fasten lower front separator panel (3) at bottom
using #10x3/4" sheet metal screws. (See Fig. 1).
10. Install top front separator panel (6) and fasten to front side casings (4) with hex head sheet metal screws in the
holes provided. (See Fig. 1).
11. Install center front separator panel (5) aligning predrilled holes and fastening to the front side casings (4) with
hex head sheet metal screws. (See Fig. 1).
12. Install front bottom panel (8) on front of base between front side casings with hex head sheet metal screws in
holes provided. (See Fig. 1).
13. Carefully inspect combustion chamber to insure the chamber ears around upper perimeter of the fiber chamber
are inserted under the metal ears of the heat exchanger pouch.
14. Install upper (9) and lower (10) burner mounting plates with gaskets onto pouch front using 9/16" brass nuts.
(See Fig. 1).